The potentiometric determination of small amounts of carbon dioxide and hydrochloric acid in the presence of each other in distilled water. An analytical contribution for the existence of barium bicarbonate

1947 ◽  
Vol 12 ◽  
pp. 384-398 ◽  
Author(s):  
F. Čůta ◽  
R. Kohn
Keyword(s):  
Carbon Dioxide ◽  
Hydrochloric Acid ◽  
Potentiometric Determination ◽  
Distilled Water

Contamination of Distilled Water, HCl, and NH4OH with Amino Acids, Proteins, and Bacteria

1974 ◽  
Vol 20 (6) ◽  
pp. 687-691 ◽  
Author(s):  
Paul B Hamilton ◽  
T Timothy Myoda
Keyword(s):  
Amino Acids ◽  
Hydrochloric Acid ◽  
Ammonium Hydroxide ◽  
Lunar Soil ◽  
Distilled Water ◽  
Chemical Reagents ◽  
Biological Interest

Abstract Contamination of distilled water with free and bound amino acids and with microbes has been overlooked in most laboratories. Unless special precautions are taken, distilled water will be contaminated with air borne microbes, probably psuedomonads, which multiply in water of conductivity quality. Amino acids and proteins that may be found in the water therefore presumably are derived from these airborne organisms. Chemical reagents such as hydrochloric acid and ammonium hydroxide solutions, which have water as an integral part, also have been found to be contaminated with amino acids. This paper deals with the extent of such contamination and describes means to provide water and hydrochloric acid (6 mol/liter) that would be suitable for determination of amino acids in concentrations of 10-9 mol/liter or less in materials of biological interest as well as rocks, lunar soil, meteorites, etc.

The leaching of granite and some other rocks

1938 ◽  
Vol 25 (163) ◽  
pp. 217-220
Author(s):  
E. H. Davison
Keyword(s):  
Carbon Dioxide ◽  
Hydrochloric Acid ◽  
Potassium Hydroxide ◽  
Potassium Hydroxide Solution ◽  
Distilled Water ◽  
Hydroxide Solution ◽  
Water Saturated

In 1913 the late Mr. J. J. Beringer suggested that it would be of interest to determine the solubility of crushed felspar (a) in distilled water free of carbon dioxide, and (b) in distilled water saturated with carbon dioxide. For this purpose crushed felspar (orthoclase) was covered with water in a silica basin (i) in a desiccator containing potassium hydroxide solution, and (ii) in a desiccator connected with a carbondioxide Kipp's apparatus. These were allowed to stand for a fortnight and the alkalinity of the water Was then determined by N/100 hydrochloric acid. This experiment was continued until the end of July, 1914. A definite solubility was determined in each case and the solubility in the carbon dioxide water was only slightly more than in the water free from carbon dioxide. Unfortunately Mr. Beringer died early in 1915, and the records of his experiment could not be found.

Determination of Carbon Dioxide in Cucumber Brines

1974 ◽  
Vol 57 (1) ◽  
pp. 130-133 ◽  
Author(s):  
Henry P Fleming ◽  
Roger L Thompson ◽  
JOHN L Etchells
Keyword(s):  
Carbon Dioxide ◽  
Hydrochloric Acid ◽  
Acid Solution ◽  
Sample Size ◽  
Sodium Hydroxide ◽  
Small Sample Size ◽  
Accurate Method ◽  
Small Sample ◽  
Small Vial

Abstract A simple, accurate method for determining carbon dioxide in fermenting cucumber brines is described. The method involves distillation of carbon dioxide from the acidified brine into standardized sodium hydroxide inside a closed jar. The sample is injected by a syringe and needle through a rubber serum stopper placed in the jar cap, into an acid solution. A small vial of sodium hydroxide placed inside the jar traps the carbon dioxide as it distills from the acidified solution. After being held in the jar 24 hr at 37°C, the vial is removed; the remaining base is titrated to the phenolphthalein end point with standardized hydrochloric acid. Advantages of the method include a limited working time, minimized loss of carbon dioxide during analysis, and a relatively small sample size.

Determination of Zinc Phosphide and Its Stability in Rodent Baits

1969 ◽  
Vol 52 (3) ◽  
pp. 662-666
Author(s):  
G O Guerrant ◽  
J W Miles
Keyword(s):  
Carbon Dioxide ◽  
Hydrochloric Acid ◽  
Zinc Phosphide ◽  
Rodent Control ◽  
Improved Method ◽  
Carbon Dioxide Atmosphere ◽  
Subsequent Determination

Abstract An improved method for determining zinc phosphide has been developed that employs liberation of phosphine by refluxing with hydrochloric acid with subsequent determination by the alkalimetric quimociac phosphorus method. Zinc phosphide was found to he relatively stable when used on apple and potato baits for rodent control, with over 70% of the activity remaining after 99-day exposure under simulated baiting conditions. Decomposition occurs more rapidly in the juices of the moist surface of freshly prepared bait than on the dried baits. Decomposition is slow in a carbon dioxide atmosphere and is accelerated by moisture.

Sign in / Sign up

Export Citation Format

Share Document